Fixed bed reactor convenient for replacing catalyst

Abstract

The utility model is applicable to the technical field of fixed bed reactors, and provides a fixed bed reactor convenient to replace a catalyst, which comprises a lower shell, fixed seats are fixedly connected to the lower parts of the two side surfaces of the lower shell, and electric telescopic rods are vertically and fixedly connected to the tops of the fixed seats. The top end of the electric telescopic rod is fixedly connected with a connecting ring, the surface of the connecting ring is fixedly connected with an upper shell matched with the lower shell, and the inner wall of the upper shell is fixedly connected with a partition plate. According to the fixed bed reactor convenient for replacing the catalyst, after a worker twists a piston and disassembles the piston from the bottom end of a containing cylinder, a particle inert catalyst can be discharged through an opening in the bottom end of the containing cylinder, after the particle inert catalyst is discharged, the piston is reinstalled, and the particle inert catalyst can be reloaded into the interior of the containing cylinder through an external thread connector; the replacement operation is simple and rapid, the replacement efficiency of the particle inert catalyst is improved, and the preparation and use of acrolein are facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of fixed bed reactors, in particular to a fixed bed reactor which is convenient for replacing catalysts. Background Art

[0002] A fixed bed reactor is a reactor that is filled with granular solid catalysts or solid reactants to form a stacked bed layer of a certain height. Gas or liquid materials flow through the gaps between the particles through the static fixed bed layer, realizing a heterogeneous reaction process. The characteristic of this type of reactor is that the solid particles filled in the equipment are fixed, which is different from the moving bed and fluidized bed in which the solid materials move in the equipment. It is also called a packed bed reactor.

[0003] During use, existing fixed-bed reactors usually require workers to replace the inert catalyst from inside the device. The replacement operation is tedious and complicated, and takes a long time, resulting in low efficiency in replacing the inert catalyst. Utility Model Content

[0004] The utility model provides a fixed bed reactor which is convenient for replacing catalysts, and aims to solve the problem that in the existing loaded tubular fixed bed reactor, workers are mostly required to replace the inert catalyst from inside the device during use, and the replacement operation is tedious and complicated.

[0005] The utility model is implemented as follows: a fixed bed reactor for facilitating catalyst replacement comprises a lower shell, wherein the lower portions of both side surfaces of the lower shell are fixedly connected to fixing seats, the tops of the fixing seats are vertically fixedly connected to electric telescopic rods, the top ends of the electric telescopic rods are fixedly connected to connecting rings, and the surface of the connecting rings is fixedly connected to an upper shell adapted to the lower shell;

[0006] The inner wall of the upper shell is fixedly connected to a partition, and a plurality of internally threaded cylinders are provided on the partition. A plurality of accommodating cylinders are vertically provided inside the lower shell, and the plurality of accommodating cylinders correspond one to one to the plurality of internally threaded cylinders. The top end of the accommodating cylinder is provided with an externally threaded joint threadedly connected to the internally threaded cylinder. The interior of the accommodating cylinder is filled with a granular inert catalyst.

[0007] The bottom end of the accommodating cylinder is threadedly connected with a piston, and the bottom end of the side wall of the accommodating cylinder is provided with a plurality of exhaust ports, and the interior of the exhaust ports is fixedly connected with a barrier net.

[0008] Preferably, the top of the upper shell is vertically connected to a feed pipe, the top of the feed pipe is provided with an upper flange, the bottom of the lower shell is vertically connected to an air outlet pipe, the bottom end of the air outlet pipe is provided with a lower flange.

[0009] Preferably, a fixed cover arranged on the outside of the feed pipe is fixedly connected to the top of the inner wall of the upper shell, and a plurality of diversion ports are opened on the surface of the fixed cover.

[0010] Preferably, a non-slip twist sleeve is fixedly connected to the top end of the surface of the accommodating cylinder.

[0011] Preferably, a tapered groove is provided at the bottom end of the inner wall of the accommodating cylinder.

[0012] Preferably, an observation window is provided on the surface of the lower shell. Beneficial effects

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] After the electric telescopic rod is extended, the upper shell body can be driven to rise, and through the connection of the partition, multiple accommodating cylinders can be driven to move to the outside of the lower shell body. After the staff twists the accommodating cylinder to rotate, the external threaded joint can be driven to rotate. By removing the external threaded joint from the inside of the internal threaded cylinder, the accommodating cylinder can be removed from the inside of the device. Then, the staff twists the piston to remove the piston from the bottom end of the accommodating cylinder, and then the granular inert catalyst can be discharged through the opening at the bottom end of the accommodating cylinder. After discharge, the piston is reinstalled, and the granular inert catalyst can be reloaded into the interior of the accommodating cylinder through the external threaded joint. The replacement operation is simple and fast, which improves the replacement efficiency of the granular inert catalyst and is beneficial to the preparation and use of acrolein. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the front structure of the utility model;

[0016] Figure 2 This is a front cross-sectional structural diagram of the present utility model;

[0017] Figure 3 It is a schematic structural diagram of the containing cylinder and the granular inert catalyst in the present invention.

[0018] In the figure: 1. Lower shell; 2. Upper shell; 3. Fixed seat; 4. Electric telescopic rod; 5. Connecting ring; 6. Seal; 7. Sealing groove; 8. Feed pipe; 9. Upper flange; 10. Fixed cover; 11. Diversion port; 12. Partition; 13. Internally threaded cylinder; 14. Accommodating cylinder; 15. Externally threaded joint; 16. Anti-slip twist sleeve; 17. Granular inert catalyst; 18. Exhaust port; 19. Barrier net; 20. Conical groove; 21. Piston; 22. Exhaust pipe; 23. Lower flange; 24. Observation window. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] See also Figure 1-3 The utility model provides a technical solution: a fixed bed reactor that is easy to replace the catalyst, comprising a lower shell 1, the lower parts of the two side surfaces of the lower shell 1 are fixedly connected with a fixing seat 3, the top of the fixing seat 3 is vertically fixedly connected with an electric telescopic rod 4, the top of the electric telescopic rod 4 is fixedly connected with a connecting ring 5, and the surface of the connecting ring 5 is fixedly connected with an upper shell 2 adapted to the lower shell 1.

[0021] A sealing member 6 is fixedly connected to the bottom of the upper shell 2 , and a sealing groove 7 adapted to the sealing member 6 is formed on the top of the lower shell 1 .

[0022] A partition 12 is fixedly connected to the inner wall of the upper shell 2, and a plurality of internal threaded tubes 13 are provided on the partition 12. A plurality of accommodating tubes 14 are vertically provided inside the lower shell 1. The plurality of accommodating tubes 14 correspond one to one to the plurality of internal threaded tubes 13. The top end of the accommodating tube 14 is provided with an external threaded joint 15 threadedly connected to the internal threaded tube 13. The interior of the accommodating tube 14 is filled with a granular inert catalyst 17.

[0023] The bottom end of the accommodating cylinder 14 is threadedly connected to a piston 21 , and the bottom end of the side wall of the accommodating cylinder 14 is provided with a plurality of exhaust ports 18 , and the interior of the exhaust ports 18 is fixedly connected to a barrier net 19 .

[0024] After the electric telescopic rod 4 is extended, it can drive the upper shell 2 to rise. Through the connection of the partition 12, it can drive multiple accommodating cylinders 14 to move to the outside of the lower shell 1. After the staff twists the accommodating cylinder 14, it can drive the external threaded joint 15 to rotate. By removing the external threaded joint 15 from the inside of the internal threaded cylinder 13, the accommodating cylinder 14 can be removed from the inside of the device.

[0025] The staff twists the piston 21 and removes the piston 21 from the bottom end of the accommodating tube 14 , and then discharges the particulate inert catalyst 17 through the opening at the bottom end of the accommodating tube 14 .

[0026] After discharge, the piston 21 is reinstalled and the granular inert catalyst 17 can be reloaded into the interior of the accommodating cylinder 14 through the external threaded joint 15. The replacement operation is simple and fast, which improves the replacement efficiency of the granular inert catalyst 17 and is beneficial to the preparation and use of acrolein.

[0027] Furthermore, the top of the upper shell 2 is vertically connected to a feed pipe 8 , the top of which is provided with an upper flange 9 , and the bottom of the lower shell 1 is vertically connected to an air outlet pipe 22 , the bottom of which is provided with a lower flange 23 .

[0028] In this embodiment, the feed pipe 8 is used to inject the raw material gas into the interior of the upper shell 2 , and the acrolein produced after the catalytic reaction can be discharged through the outlet pipe 22 .

[0029] Furthermore, a fixed cover 10 is fixedly connected to the top of the inner wall of the upper shell 2 and is arranged to cover the outside of the feed pipe 8. A plurality of diversion ports 11 are opened on the surface of the fixed cover 10.

[0030] In this embodiment, the plurality of diversion ports 11 facilitate the diversion and discharge of the raw material gas, thereby improving the dispersion of the gas flow and facilitating the subsequent catalytic reaction.

[0031] Furthermore, a non-slip twist sleeve 16 is fixedly connected to the top end of the surface of the accommodating tube 14 , and the non-slip twist sleeve 16 makes it easier for staff to twist the accommodating tube 14 .

[0032] Furthermore, a tapered groove 20 is provided at the bottom end of the inner wall of the accommodating tube 14 , and the tapered groove 20 facilitates the guiding and discharge of the granular inert catalyst 17 .

[0033] Furthermore, an observation window 24 is provided on the surface of the lower shell 1 , and the observation window 24 facilitates the staff to check the working status of the inner cavity of the lower shell 1 .

[0034] The working principle and usage process of the present invention: After the present invention is installed, the electric telescopic rod 4 is extended, which can drive the upper shell 2 to rise, and through the connection of the partition 12, the multiple accommodating cylinders 14 can be driven to move to the outside of the lower shell 1. After the staff twists the accommodating cylinder 14 to rotate, the external threaded joint 15 can be driven to rotate. By removing the external threaded joint 15 from the inside of the internal threaded cylinder 13, the accommodating cylinder 14 can be removed from the inside of the device, and then the staff twists the piston 21, and after removing the piston 21 from the bottom end of the accommodating cylinder 14, the granular inert catalyst 17 can be discharged through the opening at the bottom end of the accommodating cylinder 14. After discharge, the piston 21 is reinstalled, and the granular inert catalyst 17 can be reloaded into the interior of the accommodating cylinder 14 through the external threaded joint 15. The replacement operation is simple and fast, which improves the replacement efficiency of the granular inert catalyst 17, and is beneficial to the preparation and use of acrolein.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A fixed bed reactor that is easy to replace catalyst, characterized in that: The utility model comprises a lower shell (1), wherein the lower parts of both side surfaces of the lower shell (1) are fixedly connected to fixing seats (3), the top of the fixing seats (3) is vertically fixedly connected to an electric telescopic rod (4), the top end of the electric telescopic rod (4) is fixedly connected to a connecting ring (5), and the surface of the connecting ring (5) is fixedly connected to an upper shell (2) adapted to the lower shell (1); The inner wall of the upper shell (2) is fixedly connected to a partition (12), and a plurality of internally threaded cylinders (13) are provided on the partition (12). A plurality of accommodating cylinders (14) are vertically provided inside the lower shell (1), and the plurality of accommodating cylinders (14) correspond one-to-one to the plurality of internally threaded cylinders (13). The top end of the accommodating cylinder (14) is provided with an externally threaded joint (15) threadedly connected to the internally threaded cylinder (13). The interior of the accommodating cylinder (14) is filled with a granular inert catalyst (17); The bottom end of the accommodating cylinder (14) is threadedly connected to a piston (21), and the bottom end of the side wall of the accommodating cylinder (14) is provided with a plurality of exhaust ports (18), and the interior of the exhaust ports (18) is fixedly connected to a barrier net (19).

2. A fixed bed reactor for facilitating catalyst replacement according to claim 1, characterized in that: The top of the upper shell (2) is vertically connected to a feed pipe (8), and the top end of the feed pipe (8) is provided with an upper flange (9). The bottom of the lower shell (1) is vertically connected to an air outlet pipe (22), and the bottom end of the air outlet pipe (22) is provided with a lower flange (23).

3. A fixed bed reactor for facilitating catalyst replacement according to claim 2, characterized in that: A fixed cover (10) is fixedly connected to the top of the inner wall of the upper shell (2) and is arranged to cover the outside of the feed pipe (8). A plurality of diversion ports (11) are provided on the surface of the fixed cover (10).

4. A fixed bed reactor for facilitating catalyst replacement according to claim 1, characterized in that: The top end of the surface of the accommodating cylinder (14) is fixedly connected with an anti-slip twist sleeve (16).

5. A fixed bed reactor for facilitating catalyst replacement according to claim 1, characterized in that: A conical groove (20) is provided at the bottom end of the inner wall of the accommodating cylinder (14).

6. A fixed bed reactor for facilitating catalyst replacement according to claim 1, characterized in that: An observation window (24) is provided on the surface of the lower housing (1).

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